Dan is an independent editor, an award-winning writer, and an editorial consultant. He is currently a contributing editor at Discover magazine, where he has worked as a senior editor. His writing has appeared in print or online in Discover, Popular Science, Smithsonian, New Scientist, Audubon, Nature Conservancy magazine, Reader's Digest, Women's Health and many other publications. He was a long-time contributing correspondent for Science magazine, and he is the coauthor, with Paul Epstein, MD, of Harvard Medical School, of Changing Planet, Changing Health, the first book on the human health impacts of climate change.

Dan specializes in putting a human face on groundbreaking stories about science, technology, health and sustainability. Dan’s stories have won several honors. His profile of an obsessive builder of robotic human heads helped Popular Science win a National Magazine Award for General Excellence, and the same piece won an Outstanding Article Award for magazine profile writing from the American Society of Journalists and Authors. His story on human-robot arm wrestling was anthologized in The Best of Technology Writing 2006.

Before launching his journalism career, Dan earned a doctorate in biology from The Johns Hopkins University and worked in a microbiology lab at the University of Illinois, Urbana-Champaign, where he subsequently earned a master’s degree in journalism. Dan is a former board member of the  National Association of Science Writers, and a member of the American Society of Journalists and Authors and the Society of Environmental Journalists. In his spare time, he enjoys hiking, biking and t’ai chi. He lives in Milwaukee, Wisconsin.